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<p>Reports the usage of <code>exists</code> or <code>forall</code>
  for searching a specific element.</p>


<p>The quick-fix uses <code>contains</code> instead.</p>

<p>Example:</p>
<pre><code>
  set.exists(x => x == "a")
  set.forall(x => x != "a")
</code></pre>
<p>After the quick-fix is applied:</p>
<pre><code>
  set.contains("a")
  !set.contains("a")
</code></pre>
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